mus drag and drop: return the completed effect to the caller.

services/ui/ws/window_tree_client_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 381 matching lines @@
     NOTIMPLEMENTED();
   }
   void OnDragLeave(uint32_t window) override { NOTIMPLEMENTED(); }
   void OnCompleteDrop(uint32_t window,
                       uint32_t key_state,
                       const gfx::Point& position,
                       uint32_t effect_bitmask,
                       const OnCompleteDropCallback& callback) override {
     NOTIMPLEMENTED();
   }
+
+  void OnPerformDragDropCompleted(uint32_t window,
+                                  bool success,
+                                  uint32_t action_taken) override {
+    NOTIMPLEMENTED();
+  }
+
   void OnDragDropDone() override { NOTIMPLEMENTED(); }
 
   void OnChangeCompleted(uint32_t change_id, bool success) override {
     if (waiting_change_id_ == change_id && change_completed_run_loop_) {
       on_change_completed_result_ = success;
       change_completed_run_loop_->Quit();
     }
   }
   void RequestClose(uint32_t window_id) override {}
   void GetWindowManager(mojo::AssociatedInterfaceRequest<mojom::WindowManager>
@@ skipping 1699 matching lines @@
 
 // TODO(sky): make sure coverage of what was
 // WindowManagerTest.SecondEmbedRoot_InitService and
 // WindowManagerTest.MultipleEmbedRootsBeforeWTHReady gets added to window
 // manager
 // tests.
 
 }  // namespace test
 }  // namespace ws
 }  // namespace ui